Self-supplied hydrogen fuel cell system and working method thereof

Abstract

The Invention discloses a self-supplied hydrogen fuel cell system and a working method thereof, the system comprising a diesel tank, a gas separator, a fuel cell, a low-temperature separation reactor, a high-temperature separation reactor, an auto-thermal reformer, a water tank and a catalytic burner; With the high-temperature separation reactor, the low-temperature separation reactor and the auto-thermal reformer, diesel is cracked into H 2 and CO; as the fuel for the fuel cell, H 2 may react with O 2 in the air and generate electric energy; the unreacted H 2 and CO enter into the catalytic burner for combustion, ensuring that the water is heated; thus, it not only provides H 2 to the fuel cell, but also provides high-temperature water to the auto-thermal converter to produce H 2 ; electric energy can be generated without burning diesel; since no NO x or particulate matters but CO 2 is generated, the goal of ultra-low emission is achieved.

What is claimed is: 
     
       1. A working method for a self-supplied hydrogen fuel cell system, the self-supplied hydrogen fuel cell system comprising a diesel tank ( 1 ), a gas separator ( 2 ), a fuel cell ( 3 ), a low-temperature separation reactor ( 4 ), a high-temperature separation reactor ( 5 ), an auto-thermal reformer ( 6 ), a water tank ( 7 ) and a catalytic burner ( 8 ) having a combustor;
 wherein, the diesel tank ( 1 ) is connected to the auto-thermal reformer ( 6 ) through a pipeline; the catalytic burner ( 8 ) only comprises a first port being a steam outlet, a second port being a water inlet and a third port being a combustor port, the first port being connected to the auto-thermal reformer ( 6 ) only through a first pipeline, the second port being connected to the water tank ( 7 ) only through a second pipeline, and the third port being connected to the fuel cell ( 3 ) only through a third pipeline; the auto-thermal reformer ( 6 ), the high-temperature separation reactor ( 5 ), the low-temperature separation reactor ( 4 ), the gas separator ( 2 ) and the fuel cell ( 3 ) are connected in series; 
 an outlet pipe of the water tank ( 7 ) is connected to the water inlet of the catalytic burner ( 8 ); the auto-thermal reformer ( 6 ) only comprises an oil/steam inlet and a mixed gas outlet the steam outlet of the catalytic burner ( 8 ) is connected to the oil/steam inlet of the auto-thermal reformer ( 6 ) through a pipeline and only provides steam to the auto-thermal reformer ( 6 ); an oil outlet of the diesel tank ( 1 ) is also connected to the oil/steam inlet of the auto-thermal reformer ( 6 ) through a pipeline and only provides diesel to the auto-thermal reformer ( 6 ); the mixed gas outlet of the auto-thermal reformer ( 6 ) is connected to a gas inlet of the high-temperature separation reactor ( 5 ) through a pipeline; a gas outlet of the high-temperature separation reactor ( 5 ) is connected to a gas inlet of the low-temperature separation reactor ( 4 ) through a pipeline; a gas outlet of the low-temperature separation reactor ( 4 ) is connected to a mixed gas inlet of the gas separator ( 2 ) through a pipeline; a gas outlet of the gas separator ( 2 ) is connected to a fuel inlet of the fuel cell ( 3 ) and an exhaust outlet of the fuel cell ( 3 ) is connected to the combustor port of the catalytic burner ( 8 ); 
 the method comprising the steps of: 
 entering water into the catalytic burner ( 8 ) from the water tank ( 7 ); 
 heating, by the catalytic burner ( 8 ), the water to 100° C. to produce the steam; 
 only entering the steam into the auto-thermal reformer ( 6 ) through the catalytic burner ( 8 ) and simultaneously entering the diesel into the auto-thermal reformer ( 6 ) through the diesel tank ( 1 ); 
 making the diesel have a fission reaction with the steam and O 2  in the air in the auto-thermal reformer ( 6 ) and have adequate fission reaction through the high-temperature separation reactor ( 5 ) and the low-temperature separation reactor ( 4 ) to generate the CO and H 2  with a temperature of 180° C.; 
 entering the generated CO and H 2  to the gas separator ( 2 ) to mix with air in the gas separator ( 2 ) and heating the O 2  in the air; and 
 outputting H 2  and O 2  with a temperature of 150° C. from the gas separator ( 2 ) into the fuel cell ( 43 ) for electrochemical reaction to generate electric energy; and entering the unreacted H 2  and CO into the catalytic burner ( 8 ) for combustion and generating water and CO 2  to be discharged. 
 
     
     
       2. The working method according to  claim 1 , wherein, the water is pre-heated before entering into the catalytic burner ( 8 ) from the water tank ( 7 ). 
     
     
       3. The working method according to  claim 1 , wherein, the gas separator ( 2 ) has a housing; an air inlet is arranged on the top of the housing and a separated gas outlet is arranged on the side bottom of the housing.